I am genuinely puzzled at the concept of working a fixed set of hours. Aside from those in shift and where safety interests (rightly) dictate a maximum, I didn't think anyone really finished work at a certain time. I haven't since I finished doing shift work 20 odd years ago.

spongebob-- you seem to do the work of three people , good on you , reckon if you tried harder you could do four, thing how proud you would feel-- big shiny headstone on your grave would proclaim your endeavor

Actually, I've got one on the 12th & 17th of this month so not too bad.

Working Self Employed, at least I'm doing it for me and not making anyone else rich ( apart from the petrol stations ) so I don't mind one bit . I also like the freedom of just being able to book a Day off when I want but I have to give myself 3 weeks notice to get everyone in.

Regular hours would bore me and I can have half a day off during the week and have the trails all to myself

Man, I don't take communist bull shait propaganda about hitting targets and be a part of an amazing team. Been there, done that. Only very few companies can motivate and build such an environment.
Most others just try to pretend to brain wash and ask for free extra time from their slaves. Many have been told to be gratefull to have a job at all.
British culture approach to extra long hours for masters approval knod is pure communistic evil. But I do like American approach of rewarding, much better. Work hard, play hard.
Yeah, you sense that I am milking connoisseur

"Right. I had to get up in the morning at ten o'clock at night half an hour before I went to bed, drink a cup of sulphuric acid, work twenty-nine hours a day down mill, and pay mill owner for permission to come to work, and when we got home, our Dad and our mother would kill us and dance about on our graves singing Hallelujah."

4 x 10 days would mean those days effectively becoming nothing but work days. I could see the evening rides, the morning swims and just meeting friends at the cafe after work watching the girls go by, just not happening if I was working 10 hour days.
And I don't think I could fit everything in to the extra day off, some things need to be spread out across the week.
If I could stay on the same money for a 4 x 8 week though, that would work for me, I think I might pitch the idea to my boss tomorrow.

Some weeks i work 24 hrs, some weeks i work 32hrs, some weeks i work 16hrs, Once i've earned enough to cover bills etc i go and do stuff i enjoy doing, if i want cash to buy stuff or goodies then i work more hours.